Elastic moduli of polycrystalline ZrCo as a function of temperature

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• 作者：Agosta ; D.S. ; Hightower ; J.E. ; Foster ; K. ; Leisure ; R.G. ; Gavra ; Z.
• 关键词：Hydrogen storage materials ; Intermetallics ; Elasticity ; Ultrasonics
• 刊名：Journal of Alloys and Compounds
• 出版年：2002
• 期刊代码：45_09258388
• 类别：ms
• 出版时间：November 18, 2002
• 卷：346
• 期：1-2
• 页码：1-5
• 文件大小：275 K

摘要

The polycrystalline elastic moduli of the intermetallic compound ZrCo have been measured over the temperature range of 3–410 K. The temperature dependence of the moduli resembles that of ordinary metals; the moduli approach zero temperature with zero slope, but decrease monotonically with increasing temperature at higher temperatures. The 296 K values of the bulk, shear, and Young’s moduli are, respectively, 140, 49.2, and 132 GPa. Poisson’s ratio is almost temperature-independent increasing from 0.338 at low temperatures to 0.343 at 410 K. The acoustic contribution to the low temperature specific heat, calculated from the elastic moduli measured at 3 K, is 9.32×10⁻⁵ J/(mol K⁴). The corresponding Debye temperature is 347 K.